TED - Daniel Kish: How I use sonar to navigate the world

NUUG
https://archive.org/details/DanielKish_2015
Editor: Petter Reinholdtsen
Category: Samfunn
Uploaded: 27 Apr 2016
Length: 0:13:08 (filler)
First broadcast: March 29, 2017, 6:45 p.m.

Daniel Kish has been blind since he was 13 months old, but has learned to “see” using a form of echolocation. He clicks his tongue and sends out flashes of sound that bounce off surfaces in the environment and return to him, helping him to construct an understanding of the space around him. In a rousing talk, Kish demonstrates how this works and asks us to let go of our fear of the “dark unknown.”

TED talk downloaded from The Internet Archive.